CVE-2010-0211

CRITICAL

OpenLDAP 2.4.22 - Denial of Service via Invalid UTF-8 RDN String

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2010-0211. PoCs published by Ilkka Mattila.

AI-analyzed exploit summary The exploit demonstrates a denial-of-service (DoS) vulnerability in OpenLDAP by sending malformed LDAP modify RDN requests, causing the service to crash or behave unexpectedly. The PoC uses the `ldapmodrdn` command with crafted input to trigger the issue.

Description

The slap_modrdn2mods function in modrdn.c in OpenLDAP 2.4.22 does not check the return value of a call to the smr_normalize function, which allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a modrdn call with an RDN string containing invalid UTF-8 sequences, which triggers a free of an invalid, uninitialized pointer in the slap_mods_free function, as demonstrated using the Codenomicon LDAPv3 test suite.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Ilkka Mattila · textdoslinux
https://www.exploit-db.com/exploits/34348

The exploit demonstrates a denial-of-service (DoS) vulnerability in OpenLDAP by sending malformed LDAP modify RDN requests, causing the service to crash or behave unexpectedly. The PoC uses the `ldapmodrdn` command with crafted input to trigger the issue.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: OpenLDAP 2.4.22
No auth needed
Prerequisites: Access to the LDAP service
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (19)

Core 19
Core References
Broken Link, Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1024221
Issue Tracking x_refsource_confirm
http://support.apple.com/kb/HT4435
Third Party Advisory vendor-advisory x_refsource_gentoo
http://security.gentoo.org/glsa/glsa-201406-36.xml
Third Party Advisory x_refsource_confirm
http://www.vmware.com/security/advisories/VMSA-2011-0001.html
Broken Link, Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2010/1858
Broken Link, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40677
Mailing List vendor-advisory x_refsource_apple
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
Broken Link, Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2010/1849
Broken Link, Exploit, Patch, Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/41770
Broken Link vendor-advisory x_refsource_redhat
http://www.redhat.com/support/errata/RHSA-2010-0542.html
Broken Link, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40687
Broken Link, Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/515545/100/0/threaded
Broken Link vendor-advisory x_refsource_redhat
http://www.redhat.com/support/errata/RHSA-2010-0543.html
Third Party Advisory x_refsource_confirm
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
Broken Link, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/40639
Broken Link third-party-advisory x_refsource_secunia
http://secunia.com/advisories/42787
Broken Link vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2011/0025

Scores

CVSS v3 9.8
EPSS 0.2924
EPSS Percentile 97.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-252
Status published
Products (6)
apple/mac_os_x 10.6.0 - 10.6.5
apple/mac_os_x_server 10.6.0 - 10.6.5
openldap/openldap 2.4.22
opensuse/opensuse 11.0
vmware/esxi 4.0
vmware/esxi 4.1
Published Jul 28, 2010
Tracked Since Feb 18, 2026